package com.xhx.common.util;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.web.multipart.MultipartFile;

import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import lombok.extern.slf4j.Slf4j;

/**
 * easypoi工具类
 * 
 * @since 2021-05-15
 */
@Slf4j
public class EasyPoiUtils {
	/**
	 * excel 导出
	 *
	 * @param list           数据
	 * @param title          标题
	 * @param sheetName      sheet名称
	 * @param pojoClass      pojo类型
	 * @param fileName       文件名称
	 * @param isCreateHeader 是否创建表头
	 * @param response
	 */
	public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName,
			boolean isCreateHeader, HttpServletResponse response) throws IOException {
		ExportParams exportParams = new ExportParams(title, sheetName, ExcelType.XSSF);
		exportParams.setCreateHeadRows(isCreateHeader);
		defaultExport(list, pojoClass, fileName, response, exportParams);
	}

	/**
	 * excel 导出
	 *
	 * @param list      数据
	 * @param title     标题
	 * @param sheetName sheet名称
	 * @param pojoClass pojo类型
	 * @param fileName  文件名称
	 * @param response
	 */
	public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName,
			HttpServletResponse response) throws IOException {
		defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName, ExcelType.XSSF));
	}

	/**
	 * excel 导出
	 *
	 * @param list         数据
	 * @param pojoClass    pojo类型
	 * @param fileName     文件名称
	 * @param response
	 * @param exportParams 导出参数
	 */
	public static void exportExcel(List<?> list, Class<?> pojoClass, String fileName, ExportParams exportParams,
			HttpServletResponse response) throws IOException {
		defaultExport(list, pojoClass, fileName, response, exportParams);
	}

	/**
	 * excel 导出
	 *
	 * @param list     数据
	 * @param fileName 文件名称
	 * @param response
	 */
	public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response)
			throws IOException {
		defaultExport(list, fileName, response);
	}

	/**
	 * 默认的 excel 导出
	 *
	 * @param list         数据
	 * @param pojoClass    pojo类型
	 * @param fileName     文件名称
	 * @param response
	 * @param exportParams 导出参数
	 */
	private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response,
			ExportParams exportParams) throws IOException {
		Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
		downLoadExcel(fileName, response, workbook);
	}

	/**
	 * 默认的 excel 导出
	 *
	 * @param list     数据
	 * @param fileName 文件名称
	 * @param response
	 */
	private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response)
			throws IOException {
		Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
		downLoadExcel(fileName, response, workbook);
	}

	/**
	 * 下载
	 *
	 * @param fileName 文件名称
	 * @param response
	 * @param workbook excel数据
	 */
	private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook)
			throws IOException {
		try {
			response.setCharacterEncoding("UTF-8");
			response.setHeader("content-Type", "application/vnd.ms-excel");
			response.setHeader("Content-Disposition", "attachment;filename="
					+ URLEncoder.encode(fileName + "." + ExcelTypeEnum.XLSX.getValue(), "UTF-8"));
			workbook.write(response.getOutputStream());
		} catch (Exception e) {
			throw new IOException(e.getMessage());
		}
	}

	/**
	 * excel 导入
	 *
	 * @param filePath   excel文件路径
	 * @param titleRows  标题行
	 * @param headerRows 表头行
	 * @param pojoClass  pojo类型
	 * @param <T>
	 * @return
	 */
	public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass)
			throws IOException {
		if (StringUtils.isBlank(filePath)) {
			return Collections.emptyList();
		}
		ImportParams params = new ImportParams();
		params.setTitleRows(titleRows);
		params.setHeadRows(headerRows);
		params.setNeedSave(true);
		params.setSaveUrl("/excel/");
		try {
			return ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
		} catch (NoSuchElementException e) {
			throw new IOException("模板不能为空");
		} catch (Exception e) {
			throw new IOException(e.getMessage());
		}
	}

	/**
	 * excel 导入
	 *
	 * @param file      excel文件
	 * @param pojoClass pojo类型
	 * @param <T>
	 * @return
	 */
	public static <T> List<T> importExcel(MultipartFile file, Class<T> pojoClass) throws IOException {
		return importExcel(file, 1, 1, pojoClass);
	}

	/**
	 * excel 导入
	 *
	 * @param file       excel文件
	 * @param titleRows  标题行
	 * @param headerRows 表头行
	 * @param pojoClass  pojo类型
	 * @param <T>
	 * @return
	 */
	public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> pojoClass)
			throws IOException {
		return importExcel(file, titleRows, headerRows, false, pojoClass);
	}

	/**
	 * excel 导入
	 *
	 * @param file       上传的文件
	 * @param titleRows  标题行
	 * @param headerRows 表头行
	 * @param needVerfiy 是否检验excel内容
	 * @param pojoClass  pojo类型
	 * @param <T>
	 * @return
	 */
	public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, boolean needVerfiy,
			Class<T> pojoClass) throws IOException {
		if (file == null) {
			return Collections.emptyList();
		}
		try {
			return importExcel(file.getInputStream(), titleRows, headerRows, needVerfiy, pojoClass);
		} catch (Exception e) {
			throw new IOException(e.getMessage());
		}
	}

	/**
	 * excel 导入
	 *
	 * @param inputStream 文件输入流
	 * @param titleRows   标题行
	 * @param headerRows  表头行
	 * @param needVerfiy  是否检验excel内容
	 * @param pojoClass   pojo类型
	 * @param <T>
	 * @return
	 */
	public static <T> List<T> importExcel(InputStream inputStream, Integer titleRows, Integer headerRows,
			boolean needVerfiy, Class<T> pojoClass) throws IOException {
		if (inputStream == null) {
			return Collections.emptyList();
		}
		ImportParams params = new ImportParams();
		params.setTitleRows(titleRows);
		params.setHeadRows(headerRows);
		params.setSaveUrl("/excel/");
		params.setNeedSave(true);
		params.setNeedVerify(needVerfiy);
		try {
			return ExcelImportUtil.importExcel(inputStream, pojoClass, params);
		} catch (NoSuchElementException e) {
			throw new IOException("excel文件不能为空");
		} catch (Exception e) {
			throw new IOException(e.getMessage());
		}
	}

	/**
	 * Excel 类型枚举
	 */
	enum ExcelTypeEnum {
		XLS("xls"), XLSX("xlsx");

		private String value;

		ExcelTypeEnum(String value) {
			this.value = value;
		}

		public String getValue() {
			return value;
		}

	}

	/**
	 * 导出excel至本地-测试用
	 * 
	 * @param filePath excel路径
	 * @param workbook 对象
	 */
	public static void exportToFile(String filePath, Workbook workbook) {
		File f = new File(filePath);
		try (FileOutputStream fo = new FileOutputStream(f);) {
			workbook.write(fo);
		} catch (Exception e) {
			log.error(e.getMessage(), e);
		}
	}

}